The Victorian Opposition wants an investigation into reports the ombudsman's office may have tipped off a former senior policemen that he was under investigation.
The Opposition has seized on a newspaper article saying an Office of Police Integrity (OPI) report is understood to have implicated the ombudsman's office in a tip-off about former deputy commissioner, Sir Ken Jones.
Sir Ken quit the force after a falling out with the then chief commissioner, Simon Overland.
Opposition spokeswoman, Jill Hennessy, says the Baillieu Government needs to answer questions about the events leading up to the resignations of both Sir Ken and Mr Overland.
"These are issues that absolutely must be investigated and investigated properly," she said.
"It is my view that it would beyond belief if the Government does not come out today and announce some form of independent inquiry into these reported allegations."
The State Government says it would be highly improper for it to release the report.
Consumer Affairs minister Michael O'Brien says the Government has no control over the ombudsman's office.
"It would be in fact illegal for us to have it," he said.
"It's just extraordinary that Jill Hennessey is saying that the Government should somehow break the law and access a report that we don't have or aren't allowed to see or somehow override the independence of the ombudsman."